What scale of temperature indicates that water freezes at 32 degrees and boils at 212 degrees under standard conditions?

The Fahrenheit scale is the temperature scale on which water freezes at 32 degrees and boils at 212 degrees under standard atmospheric conditions. This scale was created by Daniel Gabriel Fahrenheit in the early 18th century. It is commonly used in the United States and a few other countries, particularly for everyday temperature measurements.

In contrast, the Celsius scale, developed by Anders Celsius, establishes that water freezes at 0 degrees and boils at 100 degrees. The Kelvin scale, which is primarily used in scientific contexts, sets absolute zero as 0 K and defines the freezing and boiling points of water at 273.15 K and 373.15 K, respectively. The Reaumur scale, less commonly used today, has water freezing at 0 degrees and boiling at 80 degrees.

Thus, the distinct freezing and boiling points of water at 32 and 212 degrees respectively clearly identify the Fahrenheit scale as the correct answer.